Yes, "Philomena" is based on a true story. The film follows Philomena Lee, an Irish woman who, decades after being forced to give up her son for adoption in a Catholic convent, seeks to find him with the help of journalist Martin Sixsmith. The screenplay is adapted from the book "The Lost Child of Philomena Lee" by Sixsmith, which details Philomena's real-life experience and her quest for her son. The film highlights themes of love, loss, and the impact of institutional secrecy.

As of my last update in October 2023, "Philomena" is not available on Netflix. However, availability may vary by region and change over time. For the most accurate and current information, it is recommended to check the Netflix platform directly or use a streaming guide.

At the end of "Philomena," after a long search, Philomena Lee finally learns the fate of her son, Anthony, who was adopted by an American couple. She discovers that he died of AIDS in 1995 and that he had been searching for her before his death. Philomena, alongside journalist Martin Sixsmith, visits his grave, where she finds closure. The film concludes with Philomena reflecting on her loss but also finding solace in the knowledge of her son's life and the love they shared, despite the years apart.